1971 Chevelle, what size tires?

[Blk60]

Hello all. Getting my 71 Chevelle convertible back on the road, been in storage for the last 20 years (ran engine and moved 300' last fall). Figure time for new tires. Currently have 15" GM Rally style rims. Tires on it are 225/70/R15.
Chevelle will be a cruiser, looking for a nice soft ride with low road noise. What are you all running?

Seeing some supply issues...hate COVID!